Wind Turbine Fed Dynamic Voltage Restorer Using Fuzzy Logic Controller for Voltage Disturbance Mitigation

In order to mitigate disturbances in the distributed system the use of Dynamic Voltage Restorer plays a very important role. A DVR deployed in a wind system which is connected to the grid, is typically used to protect voltage across grid voltage swell and sag which behaves normally under nominal voltage condition across the grid. Therefore for improving DVR’s utilities, this paper proposes the correctness of swell and sag conditions for voltages across the grid, a wind farm is to be included in the DVR so that the same DVR is used to generate energy and fed to the grid from wind farm. The current model makes use of a wind turbine to power Dynamic Voltage Restorer fed by Permanent Magnet Synchronous Generator (WT-PMSG-DVR). The paper presents DVR with fuzzy logic controller which is connected across the wind systems. Propose technique like DVR design to compensate for disturbances in voltages like swell or sag for keeping the load voltages at the desired level. The performance of a traditional DVR topologies can be improved by using controlled strategies like FLC. Simulink modelling depicts use of wind system having DVR functioning in order to compensate for voltage variations. In a MATLAB/SIMULINK environment, performances in WT-PMSG-DVR with controlling techniques like FLC and traditional Proportional Integral (PI) controller was compared. Simulations show that when DVR is supplied from a wind farm, it performs better.